Targeting Absolute Salinity for Earth and Space

Metadata Updated: March 23, 2019

As part of a grant through a NASA Johnson Space Center (JSC) 2011 Innovation Charge Account (ICA), a novel optical sensor was developed and early feasibility demonstrated in the measurement of concentration factors in spacecraft urine and urine brine waste streams.[HTML_REMOVED] As part of this development work, a secondary Earth-based application for the sensor was suggested.[HTML_REMOVED] Specifically, the optical sensor might be used to predict so-called [HTML_REMOVED]absolute[HTML_REMOVED] salinity, a new salinity parameter believed critical for improved[HTML_REMOVED]modeling of the ocean[HTML_REMOVED]s thermodynamic processes and better predicting global climate change. For both applications, the need to improve the sensor[HTML_REMOVED]s measurement sensitivity was recognized.[HTML_REMOVED] The current project investigated methods to improve measurement sensitivity over the 2011 developed ICA optical sensor.[HTML_REMOVED] Interim results suggest up to at least a 20-fold increase in waveguide[HTML_REMOVED]response can be achieved using a novel design and construction of a hybrid waveguide sensor.[HTML_REMOVED] The continued development of an optical sensor platform capable of enhanced measurements of solution concentration is certain to find use in a broad range of important Earth and space applications. As part of a 2011 JSC Innovation Charge Account (ICA) call, a novel in-line optical sensor was developed and early feasibility demonstrated in the measurement of concentration factors in spacecraft urine/urine brine samples using a novel optical waveguide sensor.[HTML_REMOVED] During the course of the 2011 work, a second application of the waveguide sensor was realized.[HTML_REMOVED] Specifically, it was conceived that the optical sensor could be packaged and used for in-situ estimates of so-called [HTML_REMOVED]absolute[HTML_REMOVED] salinity.[HTML_REMOVED] This salinity parameter is being suggested as a potential new standard for modeling the ocean[HTML_REMOVED]s thermodynamic processes and better predicting global climate change.[HTML_REMOVED] For both applications, it was recognized that the sensitivity of the 2011 ICA sensor would need to be improved. The current project proposed the investigation of methods to improve the sensitivity of[HTML_REMOVED]the optical sensor, by way of parameters such as: the physical dimensions of the system, use of alternative waveguide materials, light sources and light conditioning, and treatments to fiber optic waveguide materials.[HTML_REMOVED] Interim results have demonstrated at least a 20-fold increase in sensitivity over[HTML_REMOVED] the concentration range of interest using a novel design and construction of a hybridized waveguide system.[HTML_REMOVED] A New Technology Report describing the sensor has been submitted, MSC-25706-1.

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Public: This dataset is intended for public access and use. License: U.S. Government Work

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Dates

Metadata Created Date August 1, 2018
Metadata Updated Date March 23, 2019

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date March 23, 2019
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_12140
Maintainer
TECHPORT SUPPORT
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Datagov Dedupe Retained 20190322235447
Harvest Object Id 5e82de30-9d13-494b-befd-e43c79694182
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2013-06-01
Homepage URL https://techport.nasa.gov/view/12140
License http://www.usa.gov/publicdomain/label/1.0/
Data Last Modified 2018-07-19
Program Code 026:027
Source Datajson Identifier True
Source Hash ce4946f789a8ad316668987cde54d2f10c1f3bda
Source Schema Version 1.1

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